package test08;

import java.util.Stack;

class MyQueue {

    Stack<Integer> stack1 ;
    Stack<Integer> stack2 ;

    public MyQueue() {
        stack1 = new Stack<>();
        stack2 = new Stack<>();

    }

    public void push(int x) {
        stack1.push(x);
    }

    public int pop() {
        peek();

        return stack2.pop();
    }

    public int peek() {
        if(!stack2.empty()){
            return stack2.peek();
        }else {
            while(!stack1.empty()){
                stack2.push(stack1.pop());
            }
            return stack2.peek();
        }
    }

    public boolean empty() {
        if(stack1.empty() && stack2.empty()){
            return true;
        }
        return false;
    }
}